feat(data): impl Data for OnceLock

src/data/impls/core.rs

@@ -332,6 +332,42 @@ impl<D: Data> Data for core::cell::OnceCell<D> {
     }
 }
 
+impl<D: Data> Data for std::sync::OnceLock<D> {
+    #[inline]
+    fn provide_value<'d>(&'d self, builder: &mut dyn ValueBuiler<'d>) {
+        if let Some(d) = self.get() {
+            d.provide_value(builder);
+        }
+    }
+    #[inline]
+    fn provide_links(&self, links: &mut dyn Links) -> Result<(), LinkError> {
+        if let Some(d) = self.get() {
+            d.provide_links(links)?;
+        }
+        Ok(())
+    }
+    #[inline]
+    fn query_links(
+        &self,
+        links: &mut dyn Links,
+        query: &crate::query::Query,
+    ) -> Result<(), LinkError> {
+        if let Some(d) = self.get() {
+            d.query_links(links, query)?;
+        }
+        Ok(())
+    }
+
+    #[inline]
+    fn get_id(&self) -> Option<crate::id::ID> {
+        if let Some(d) = self.get() {
+            d.get_id()
+        } else {
+            None
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use crate::value::Value;